Testosterone replacement therapy (TRT) does cause acne in a significant number of people. In one large study of nearly 1,000 patients starting testosterone therapy, acne prevalence jumped from 6.3% before treatment to 31.1% afterward. The breakouts typically peak within the first six months and gradually improve within the first year, though they can persist for longer.
Why Testosterone Triggers Breakouts
Your skin’s oil glands are androgen-sensitive tissue. When you raise testosterone levels through TRT, more of that testosterone gets converted into a more potent form called DHT right inside the oil glands themselves. This conversion happens through an enzyme concentrated in the skin’s oil-producing cells. DHT binds to receptors in those glands and ramps up oil production, which is the single biggest prerequisite for acne in any patient.
But excess oil is only part of the story. Androgens also promote thickening and overgrowth of the cells lining your hair follicles. This creates plugs that trap oil beneath the surface, forming the earliest acne lesions. On top of that, androgen activity in the skin directly promotes the inflammatory response from immune cells, which is why TRT acne often shows up as red, inflamed bumps rather than just whiteheads or blackheads. The combination of more oil, clogged pores, and heightened inflammation is what makes hormone-driven acne particularly stubborn.
How Common It Is
The numbers vary depending on the study and population, but the pattern is consistent. In smaller prospective studies tracking patients closely, facial acne rates climbed from around 30% at baseline to over 80% after four to six months of testosterone therapy. Back and chest acne showed even more dramatic increases, going from roughly 15% to nearly 90% in one study of 20 patients.
Larger retrospective data paints a somewhat milder picture. Among 988 patients starting testosterone therapy, about one in four (25.1%) developed new acne within two years. Age matters: patients under 29 had incidence rates around 25 to 30%, while those over 28 saw rates closer to 17%. If you’re younger and starting TRT, your odds of dealing with acne are meaningfully higher.
When Breakouts Start and How Long They Last
Most people notice acne developing within the first few months of starting TRT. Breakouts tend to peak around the six-month mark, then gradually improve through the first year as your body adjusts to the new hormone levels. For some people, the acne resolves on its own once hormone levels stabilize. For others, it can persist for years. Dose increases can also trigger new flare-ups or worsen existing acne, sometimes severely.
Does the Type of TRT Matter?
The delivery method influences how your testosterone levels fluctuate, which can affect acne risk. Injections create a spike in testosterone that gradually falls before the next dose, and those peaks may contribute to more skin issues. Topical gels deliver a steadier level throughout the day, with testosterone peaking 16 to 22 hours after application and absorbing continuously over the 24-hour dosing period. In clinical trials, gel formulations like AndroGel reported acne in 1% to 8% of users. Injectable formulations also list acne as a common side effect, though direct head-to-head comparisons on acne rates between methods are limited.
The key factor across all delivery methods is where your blood levels end up. Levels that climb above the normal physiological range are more likely to drive oil production and breakouts. Keeping your levels within the target range through proper dosing and monitoring is one of the most effective ways to reduce acne risk.
How to Manage TRT Acne
There are no formal guidelines written specifically for TRT-related acne, so treatment follows the same general approach used for other forms of hormonal acne, scaled to severity.
For Mild Breakouts
Over-the-counter products with benzoyl peroxide, salicylic acid, or adapalene (a retinoid available without prescription) are reasonable first steps. Topical retinoids work well for both comedonal acne (clogged pores) and inflamed bumps. For chest and back acne, which is especially common with TRT, trifarotene is the only topical retinoid specifically approved for truncal acne. If a topical antibiotic like clindamycin is used, combining it with benzoyl peroxide is important to prevent bacterial resistance, and topical antibiotics should be limited to about 12 weeks.
A newer option is a topical androgen receptor blocker (clascoterone) that works directly on the skin to block testosterone’s effect on oil glands without affecting your systemic hormone levels. This makes it a particularly appealing option for people on TRT who don’t want to counteract the therapy itself.
For Moderate to Severe Acne
When topicals aren’t enough, oral antibiotics are the usual next step, typically limited to three months as an initial course. For truly severe or resistant cases, isotretinoin (commonly known by its former brand name Accutane) has shown strong results. In a review of studies covering 67 patients on testosterone therapy, isotretinoin led to marked or complete improvement in 87% of cases. The catch: relapse was common, and some patients needed repeat courses. Psychiatric side effects did not occur at rates higher than would be expected in the general population.
One treatment that works well for hormonal acne in women, spironolactone, is generally not a good fit for men on TRT. It blocks androgen receptors throughout the body, which would undermine the purpose of testosterone therapy and can cause side effects like breast tenderness.
Skincare Habits That Help
What you do with your skin day to day can be the difference between acne clearing or not, even when you’re using the right treatments. The American Academy of Dermatology highlights several practical points for people on testosterone therapy. Avoid scrubbing your face or body aggressively. Harsh scrubbing irritates skin and triggers flare-ups, even when you’re following an effective treatment plan. Choose breathable fabrics over polyester or spandex, especially during exercise, since trapped sweat and friction on the chest and back worsen breakouts. Use skin care products labeled non-comedogenic, meaning they won’t clog pores. And if you wear any sports equipment against your skin, clean it regularly and consider a moisture-wicking layer underneath.
Starting a simple, consistent routine early, ideally when you first notice mild breakouts rather than waiting for them to worsen, gives you the best chance of keeping TRT acne manageable without needing to escalate to stronger treatments.